I've run a bunch more tests. Interpolation doesn't seem to be too much of a factor for me. I do seem to be able to make it worse when I turn on the soft shadows for the distant light and set the sphere radius to 1000. I had done that in order to get any sort of soft shadows to appear at all. This might be the fly in the ointment for me. I'll have to do more tests later. -Kix

-Kix